Coral-shaped ZnO nanostructures for dye-sensitized solar cell photoanodes
Article first published online: 22 JUN 2012
Copyright © 2012 John Wiley & Sons, Ltd.
Progress in Photovoltaics: Research and Applications
Volume 22, Issue 2, pages 189–197, February 2014
How to Cite
Lamberti, A., Gazia, R., Sacco, A., Bianco, S., Quaglio, M., Chiodoni, A., Tresso, E. and Pirri, C. F. (2014), Coral-shaped ZnO nanostructures for dye-sensitized solar cell photoanodes. Prog. Photovolt: Res. Appl., 22: 189–197. doi: 10.1002/pip.2251
- Issue published online: 18 JAN 2014
- Article first published online: 22 JUN 2012
- Manuscript Accepted: 9 MAY 2012
- Manuscript Revised: 18 APR 2012
- Manuscript Received: 5 SEP 2011
- dye-sensitized solar cells;
- zinc oxide;
- branched nanostructures thermal oxidation
A highly efficient ZnO photoanode for dye-sensitized solar cells was successfully grown by a simple, low cost, and scalable method. A nanostructured coral-shaped Zn layer was deposited by sputtering onto fluorine-doped tin oxide/glass slices at room temperature and then thermally oxidized in ambient atmosphere. Stoichiometry, crystalline phase, quality, and morphology of the film were investigated, evidencing the formation of a highly porous branched nanostructure, with a pure wurtzite crystalline structure. ZnO-based dye-sensitized solar cells were fabricated with customized microfluidic architecture. Dye loading on the oxide surface was analyzed with ultraviolet-visible spectroscopy, and the dependence of the cell efficiency on sensitizer incubation time and film thickness was studied by current-voltage electrical characterization, incident photon-to-electron conversion efficiency, and impedance spectroscopy measurements, showing the promising properties of this material for the fabrication of dye-sensitized solar cell photoanodes with a solar conversion efficiency up to 4.58%. Copyright © 2012 John Wiley & Sons, Ltd.